sudo vim ./ros.asc
sudo apt-key add ./ros.asc
ros.asc as follow
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1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=i0tj
-----END PGP PUBLIC KEY BLOCK-----